Snap button



FIG. 1 is a perspective view of the front, top and right side of a snap button, showing our new design;

FIG. 2 is a perspective view of the rear, top and left side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof, the right side view being mirror image thereof; and,

FIG. 6 is a top plan view thereof, the bottom view being mirror image thereof. 

CLAIM The ornamental design for a snap button, as shown and described. 